Durham opened their account in this season's Yorkshire Bank 40 with a five-wicket win over Lancashire at Emirates Old Trafford.
The Dynamos bounced back from Sunday's home loss to Essex with an impressive run chase, Phil Mustard's 91 helping them overhaul the Lightning's total of 216-9 with 31 balls to spare.
Mustard blasted two sixes and eight fours at the top of the order before falling to left-arm spinner Simon Kerrigan with the finishing line in sight.
The wicketkeeper-batsman had combined with Mark Stoneman, who contributed 32 until he was bowled by Oliver Newby, to put on an opening stand worth 71 from just 42 deliveries.
Ryan Pringle then fell cheaply but Paul Collingwood was happy to play second fiddle to Mustard in a fourth-wicket partnership of 90, the former England international making 38 from 48 deliveries.
Neither well-set batsman was able to see the job through to the end and Ben Stokes also fell with victory close, leaving Dale Benkenstein to steer Durham home with an unbeaten 17.
Lancashire had earlier looked on course to post a bigger total than they ended up with after openers Stephen Moore (46) and Ashwell Prince (34) put on 73.
However both departed in the space of 10 runs and from then on the Lightning lost wickets at regular intervals to check their progress.
Karl Brown made 32 and Wayne White showed his all-round qualities with 37 before chipping a return catch back to Chris Rushworth, who finished as the pick of the Durham attack with figures of 3-44 from his eight overs.